104 int readpng2_init(mainprog_info *mainprog_ptr)  in readpng2_init()  argument
112     png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), mainprog_ptr,  in readpng2_init()
134     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_init()
169     png_set_progressive_read_fn(png_ptr, mainprog_ptr,  in readpng2_init()
175     mainprog_ptr->png_ptr = png_ptr;  in readpng2_init()
176     mainprog_ptr->info_ptr = info_ptr;  in readpng2_init()
189 int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length)  in readpng2_decode_data()  argument
191     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_decode_data()
192     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_decode_data()
198     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_decode_data()
200         mainprog_ptr->png_ptr = NULL;  in readpng2_decode_data()
201         mainprog_ptr->info_ptr = NULL;  in readpng2_decode_data()
218     mainprog_info  *mainprog_ptr;  in readpng2_info_callback()  local
241     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_info_callback()
243     if (mainprog_ptr == NULL) {         /* we be hosed */  in readpng2_info_callback()
262     mainprog_ptr->width = (ulg)width;  in readpng2_info_callback()
263     mainprog_ptr->height = (ulg)height;  in readpng2_info_callback()
269     if (mainprog_ptr->need_bgcolor)  in readpng2_info_callback()
283                mainprog_ptr->bg_red   = pBackground->red   >> 8;  in readpng2_info_callback()
284                mainprog_ptr->bg_green = pBackground->green >> 8;  in readpng2_info_callback()
285                mainprog_ptr->bg_blue  = pBackground->blue  >> 8;  in readpng2_info_callback()
288                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
289                      mainprog_ptr->bg_blue = pBackground->gray? 255 : 0;  in readpng2_info_callback()
291                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
292                      mainprog_ptr->bg_blue = (255/3) * pBackground->gray;  in readpng2_info_callback()
294                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
295                      mainprog_ptr->bg_blue = (255/15) * pBackground->gray;  in readpng2_info_callback()
297                mainprog_ptr->bg_red   = (uch)pBackground->red;  in readpng2_info_callback()
298                mainprog_ptr->bg_green = (uch)pBackground->green;  in readpng2_info_callback()
299                mainprog_ptr->bg_blue  = (uch)pBackground->blue;  in readpng2_info_callback()
346         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma);  in readpng2_info_callback()
348         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455);  in readpng2_info_callback()
352             (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), gamma);  in readpng2_info_callback()
355             (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), 45455);  in readpng2_info_callback()
360     mainprog_ptr->passes = png_set_interlace_handling(png_ptr);  in readpng2_info_callback()
368     mainprog_ptr->rowbytes = (int)png_get_rowbytes(png_ptr, info_ptr);  in readpng2_info_callback()
369     mainprog_ptr->channels = png_get_channels(png_ptr, info_ptr);  in readpng2_info_callback()
377     (*mainprog_ptr->mainprog_init)();  in readpng2_info_callback()
392     mainprog_info  *mainprog_ptr;  in readpng2_row_callback()  local
405     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_row_callback()
410     mainprog_ptr->pass = pass;  in readpng2_row_callback()
417     png_progressive_combine_row(png_ptr, mainprog_ptr->row_pointers[row_num],  in readpng2_row_callback()
424     (*mainprog_ptr->mainprog_display_row)(row_num);  in readpng2_row_callback()
438     mainprog_info  *mainprog_ptr;  in readpng2_end_callback()  local
443     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_end_callback()
453     (*mainprog_ptr->mainprog_finish_display)();  in readpng2_end_callback()
467 void readpng2_cleanup(mainprog_info *mainprog_ptr)  in readpng2_cleanup()  argument
469     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_cleanup()
470     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_cleanup()
475     mainprog_ptr->png_ptr = NULL;  in readpng2_cleanup()
476     mainprog_ptr->info_ptr = NULL;  in readpng2_cleanup()
490     mainprog_info  *mainprog_ptr;  in readpng2_error_handler()  local
504     mainprog_ptr = png_get_error_ptr(png_ptr);  in readpng2_error_handler()
505     if (mainprog_ptr == NULL) {         /* we are completely hosed now */  in readpng2_error_handler()
519     longjmp(mainprog_ptr->jmpbuf, 1);  in readpng2_error_handler()